At 16.25 hours on 11 Dec 1942, U-443 hit HMS Blean (L 47) (Lt N.J. Parker, RN) with one torpedo. Puttkamer thought that the second torpedo fired at 16.27 hours damaged a steamer in convoy KMF-4, but it hit the destroyer as well. The vessel sank by the stern within four minutes 11 miles 260° off Oran. Eight officers and 86 ratings were picked up by HMS Wishart (D 67) (Cdr H.G. Scott, RN).